{
  "manageEntity": {
    "action": "Save",
    "entityId": "968972116",
    "entityType": "Track",
    "nonce": "0xc653794022df7c0aab7bb10b7b97d81f52d8cf0deb51acbb8656ee9aee3fa30b",
    "signature": "0xe3b0daa55a23ace1901a56b965d746dd444667525df4ddc6075d2d7b696c30e57772bfc810ca94c24dd62bd538e2626c4702c56ed41924375d1e9130c0cd69721b",
    "signer": "0x84B42609E987DD0953e02498E61987fB833B7C92",
    "userId": "887547386"
  }
}