{
  "manageEntity": {
    "action": "Save",
    "entityId": "1863063470",
    "entityType": "Track",
    "nonce": "0x29c3f508feaba50bf78082ce32e3bded9ca9ad6c7bd95a8236799b88ed92e140",
    "signature": "0x5de2fc48d860e014f1ded8d11aeb6eaede35c2d5958c8a173aca4c8e8d8bc7895e1da9406dd315eb1efd99166481955e5001813b7841a26cee4c740f0672e29c1c",
    "signer": "0x43dA66b40816c8fb9e2B0AA77E0643192169AF14",
    "userId": "636236864"
  }
}