{
  "manageEntity": {
    "action": "Save",
    "entityId": "1443891018",
    "entityType": "Track",
    "nonce": "0x3afcd5110d35724c84fd7fa0cbc214c5f9fc6edfea7a24050b64499842d17722",
    "signature": "0xd5144e8dc5abfe5f9a8128845a071f3ebde10d7cd6ee199869b22ae0460fec745465de740c615d5de50983e217f041fe03e397d450992a1f08c90ce5385e05d51c",
    "signer": "0x43dA66b40816c8fb9e2B0AA77E0643192169AF14",
    "userId": "636236864"
  }
}