{
  "manageEntity": {
    "action": "Save",
    "entityId": "1220748536",
    "entityType": "Track",
    "nonce": "0x91c6cba9f5ba9ce6000539c6bebe0cd00583ffc669544c99c7a197884d4675ce",
    "signature": "0xd609dd564c87dccb096f2e64bd45593372d9792b578a5723f080d239c305ccf42c7ae48a2cfd530c56eba46f24d042b60571ceb645eaa13f8f614cbaebc022aa1c",
    "signer": "0x866c9135AB994f6F3351c1ED8F1c3f8bA8eDDafE",
    "userId": "954104006"
  }
}