{
  "manageEntity": {
    "action": "Save",
    "entityId": "160453661",
    "entityType": "Track",
    "nonce": "0x3170f85a4dea11cb18b1f2ef5be8c291acff941beb5111a719be8e94fc919d3e",
    "signature": "0x090a1facb59631c1c118af8d095fd969e98f384370b8ec460483dc48f307e57b7ac9ddda12aa5dac3f4efe140fe3f3cc05e46caf91127a44b80901ad25ce735e1b",
    "signer": "0x19EDB4c1a8740c323f6e57B80F3422C01875289e",
    "userId": "390804"
  }
}