{
  "manageEntity": {
    "action": "Save",
    "entityId": "316997069",
    "entityType": "Track",
    "nonce": "0x2f2c555339a5291ae255544891cba63d56ff2b0305389bb5f202f7c4a8e3c34d",
    "signature": "0xd5b9865212d888a8b0eae560ed2ec8ca2b4d5cb25a302509d6603ecdd28bf1da703f4994907f85ec6f0ffdb5405d57aa56234f386d465dbbefeaddc6ace5c0651b",
    "signer": "0x73317E9D44b6E1b7d146760b12dc5546Cd140ED2",
    "userId": "683609933"
  }
}