{
  "manageEntity": {
    "action": "Save",
    "entityId": "1339418956",
    "entityType": "Track",
    "nonce": "0x1d632b3f47350bf27011a0de5a28b712ce6e11ebddca3dfbad8e0eb5d29f3dbb",
    "signature": "0xa81cd2984b73690d22579934a26024e0bff416affbb2e43c7cdcc7db6908cc1633249904be1814af503cab7d19f0e72233448509be882e237e2a28b4a3c268471b",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}