{
  "manageEntity": {
    "action": "Save",
    "entityId": "2053857502",
    "entityType": "Track",
    "nonce": "0xbb8415961290af19e16c9e64ff98ad5b6733c519889b8ecb555327919e42a74f",
    "signature": "0xb9ac953dc08ff8219fabd81727c0b25ee835d7ee2fee4a6ff37e67bebb31ef4735e66e960d9948f921e61afb550d22affb01e7c02edee88287d4755ea59baf021b",
    "signer": "0x84B42609E987DD0953e02498E61987fB833B7C92",
    "userId": "887547386"
  }
}