{
  "manageEntity": {
    "action": "Save",
    "entityId": "630979",
    "entityType": "Track",
    "nonce": "0x88482a1e78d06730e870062cba9f5bf9131400a727eac950f1378f6e64e0adf3",
    "signature": "0x3e7e4273c016d8a1d15a92b08b26f82819a2163a56cb50f40f8f030e2c088e3935546d611223ae06000d72b98fbaf0170379b3ed36a148e43b8e8205446471e51c",
    "signer": "0x6068Da6B0a791A756931bE32de98D46eBb95890c",
    "userId": "475275462"
  }
}