{
  "manageEntity": {
    "action": "Save",
    "entityId": "766611132",
    "entityType": "Track",
    "nonce": "0xcadf46dddb1c5d0ea35ed0f1396e489e89a47eb2873430a44e8ea0e5696d761c",
    "signature": "0xddccc4c7ea0e512e589bc7c2efd477af8627011422ed17320f13dfcbfaa0f19767bb7ec77c13f4b19f99f4f2acd0e266784b33d0ba9cbb7610aa8ec1def6a1521b",
    "signer": "0x84B42609E987DD0953e02498E61987fB833B7C92",
    "userId": "887547386"
  }
}