{
  "manageEntity": {
    "action": "Save",
    "entityId": "60041403",
    "entityType": "Track",
    "nonce": "0x8403bc5b5a49b328e70f43860172691f897f0a324c645cd50f109c62f2c8a7ba",
    "signature": "0xd7d7ce964b6c8c78626672a5f5ad4999dcee6e76ffd297df7db8008c39e3469f5b2bc5a62a745a28279cd1ad3ee5ae7dcbf433f407cd684156e4c62dd13483d51c",
    "signer": "0x5fa60F185681545769de01098bB8F29cfbaE3cF0",
    "userId": "489026160"
  }
}