{
  "manageEntity": {
    "action": "Save",
    "entityId": "1429998384",
    "entityType": "Track",
    "nonce": "0xe27b2b4abe32bc966ec9a92f02d17b40b3f17303d754ffbbbe10e05c1a6f22ae",
    "signature": "0x3e0d89c868522744b3cd115c5dd90aa34331ea127be57f6c919b6d8f3f498693411819aab52fea8497d16425b719099529ba906d784a6fce733ab462ac9c748f1c",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}