{
  "manageEntity": {
    "action": "Save",
    "entityId": "325380",
    "entityType": "Track",
    "nonce": "0xbd562bc97f06f994921260c9d1a1e79249ae5ea9711f62301321021345073e50",
    "signature": "0xb7e52d7a1289834ad15cb2b885fdbc497a296efd532efafccde662d9ec2adc8a3db7ee55dae787c4b13cd789e77a529cf069bb6bd144d557e6d6c58f479d97511b",
    "signer": "0x0fe82f565AaE260D57b8e691c61Fb05fE83B6F81",
    "userId": "614212580"
  }
}