{
  "manageEntity": {
    "action": "Save",
    "entityId": "168738",
    "entityType": "Track",
    "nonce": "0x118fd1c079a2a5af293286296e72439f99d439101f8a0d13b3ec9ab2e69900d2",
    "signature": "0x35123d167552e3142d8936be5d1969f1abca5c3490e38c0498812657a6c4b48d294db456c0638cb29aedc08af7742f681e90108c7af9a0ff9320b4b0f56907011b",
    "signer": "0x12705C8Fe8CE886CeFEFa0d4d46E906f2c35C954",
    "userId": "477934274"
  }
}