{
  "manageEntity": {
    "action": "Save",
    "entityId": "70789",
    "entityType": "Track",
    "nonce": "0xcf661bf1fb3f37cb0311ffd3fc92a8f1e91cd9e4008ee4e6de9935581a19996a",
    "signature": "0x7a717279c14a89a01fbe508c8c0a2962ef8536cd0a44eb16d488586e63a7022b19999f551a870b4f8be55647110de5a63409f61de0dc85028917b8953623bb2a1b",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}