{
  "manageEntity": {
    "action": "Save",
    "entityId": "733700",
    "entityType": "Track",
    "nonce": "0x7f7eec47a48826a082034620841b2eddfd8225dea10d8815d2efddd403643876",
    "signature": "0x8abd0abc96d3498ec3035b973216acc8b1ab19ecde5b440f5bd363ea05560cef1417e9621e92e7f56b15ab92f09550fa1e0f0e1b6ca5f3ad0da5cff4296b59c11b",
    "signer": "0x262a2A1c96da0dFD6f33595c8D775BefA860d02e",
    "userId": "486490947"
  }
}