{
  "manageEntity": {
    "action": "Save",
    "entityId": "893118722",
    "entityType": "Track",
    "nonce": "0x39b007bdf5a79e38349862978fc159f112534606c204dac32080c215a66818d8",
    "signature": "0xf3e0844d109e1a32339a79d57fab75ac7fdd524a0e2abc3a59c89c07ba0b39ac2dd14b5ee1364dec49e2618de629ab5ac40b4f9e1b939855468eeb38192a263e1c",
    "signer": "0x639B9598C075dEDFE2d8FfB1B5B6ca259D3C425E",
    "userId": "667809204"
  }
}