{
  "manageEntity": {
    "action": "Save",
    "entityId": "2138633081",
    "entityType": "Track",
    "nonce": "0x0a7e29909eadd79b6a0db86a68d895ae810677225471a1b1276282029f397d8e",
    "signature": "0x4fe20cb8270ee560e34078a02f5a902ecd9937168dd86dce3ab855e80bb46c594e27e5062993c98b46400d466da21053420af7677c3f0ed98baf58a269bb523e1c",
    "signer": "0xd708949D0521A856Ca6eB44B4112bAEE59741ADD",
    "userId": "490478463"
  }
}