{
  "manageEntity": {
    "action": "Save",
    "entityId": "630365930",
    "entityType": "Track",
    "nonce": "0xaab3eabe25666beae83d7ba5cc8f64e14f0e1c92ee2c3610a903ebd6a9bad75b",
    "signature": "0x6793f319aa71806263ad7a6b00919203cc4807150708ac2918fc83b758138a0c543fcdd6fa38a00fa37439eb2a37c561f00c69dea4c803d3e1eaf305a0784f531c",
    "signer": "0xbe916820AF010608151C80f3A74F7c83218094B2",
    "userId": "881446128"
  }
}