{
  "manageEntity": {
    "action": "Save",
    "entityId": "2043076746",
    "entityType": "Track",
    "nonce": "0xf1aa2d57aeaa94900367651337015c2e3ed95e4781899f10f6cdf4e37a9800ec",
    "signature": "0xb982ac8e4d7d7b9c11d0254bb028c1f664216f65e6aa38aa001e2ac53cbf155c09b680b3271f82212b01c48a8d6f6186fa87c6dfc77600680a0dad7d5e92b6be1b",
    "signer": "0x5fa60F185681545769de01098bB8F29cfbaE3cF0",
    "userId": "489026160"
  }
}