{
  "manageEntity": {
    "action": "Save",
    "entityId": "18287106",
    "entityType": "Track",
    "nonce": "0x11985a555e47beb796c0c87a80d103fb658b7cffa86b0654e1669fb2bcc34181",
    "signature": "0xbd9b46e7f0fe6d91296eef3cce7e73b7b5f59e50b24a0a092f2648305392f50242a116eef0979e35c58a7c140e9390b29692fa3999bf8e19b636716bed2a64f91c",
    "signer": "0xd648B38B61b65e4F8df57D4EE65560D8DaacFDb2",
    "userId": "277314120"
  }
}