{
  "manageEntity": {
    "action": "Save",
    "entityId": "352391842",
    "entityType": "Track",
    "nonce": "0x9d6aca74b12b2f41fcec85d93573a0335602e1b31a09269720603e56c1e413aa",
    "signature": "0xf3c7a8b9f8d0a5bf24c946b624dd29000d0583fa583478ae0ef6438eb500643103b8a2bfb9db668c4f00ce4e4205c4d703a873766186e49d726cd3b01c3474001c",
    "signer": "0xF11F60bFb591E532d6E71E699ddfdfC58f377CA1",
    "userId": "458027684"
  }
}