{
  "manageEntity": {
    "action": "Save",
    "entityId": "1130030430",
    "entityType": "Track",
    "nonce": "0x6e9f42cfd233eec7313e63d60ad51768d7b96ab30de8046efaec492d6559517a",
    "signature": "0xbc3d2266e132432f46e1ac37836115f317bbb967bb3eacad58374f31d535f1407a77d6545a8cca0ded813995ad07274de4ba8f9c0872cc5d88be53b58535bf111b",
    "signer": "0x44Fe9338D9d1405927C73FDA0be0F36ae481Cd39",
    "userId": "983568397"
  }
}