{
  "manageEntity": {
    "action": "Save",
    "entityId": "1441830895",
    "entityType": "Track",
    "nonce": "0x79c86eabed60aae11da0fad76c0e277be07a0d219c2652e28f4c07d5c61c45c0",
    "signature": "0x52246f9cf118b708134a4a239d0d29223a39c139d3d98a60261e5bfe4c2030d8658e2ae2a26ec97189f1be73f2cdd8f5646356a47c0368a20813a46229423f231c",
    "signer": "0xD9254B079e0e1571E56512C57188F2eec899054f",
    "userId": "854498636"
  }
}