{
  "manageEntity": {
    "action": "Save",
    "entityId": "891853438",
    "entityType": "Track",
    "nonce": "0x07bd914a74cbe886b2d60562c301d4bd58f504f057c9eefc6d02731c16f7428e",
    "signature": "0x2834cefe42a3ffd602e2cec6b984a43888f181b7c62f0728e4f135fd7bcb0f2a776535e9e129510f4a5d544cdb9c5e1677e2ee5faec08b22017beda189632d551c",
    "signer": "0xa22176a11BF6703EFe39D488aA7cC06aa781C44A",
    "userId": "633924738"
  }
}