{
  "manageEntity": {
    "action": "Save",
    "entityId": "991545745",
    "entityType": "Track",
    "nonce": "0xb1f8814b201fafb053668c1cf47743eb86767f9a89942605645b73a11ed4550e",
    "signature": "0x10840ac272a111e20b9b22a5bcc03c239d36b26975ef234db232b0eec2df8e7905ddb048c6f77416a5e156453b627d4c05d4f4e7f1a08f30999ff1981f2cc1421b",
    "signer": "0x6068Da6B0a791A756931bE32de98D46eBb95890c",
    "userId": "475275462"
  }
}