{
  "manageEntity": {
    "action": "Save",
    "entityId": "951118136",
    "entityType": "Track",
    "nonce": "0x7c6fe56c97633fa9acc6ad2fcf36623580435fb2fd36f515d477b78f1da5a62e",
    "signature": "0x3598d2616b51e01ffcbfea4b34753b4458762bbaac1890888d82e2b2d1599744099d24ac09fb43f9a7da69af87d847484e528f2edf371627cdfb9689f98ae0731c",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}