{
  "manageEntity": {
    "action": "Save",
    "entityId": "810548095",
    "entityType": "Track",
    "nonce": "0x2ff97440d56f1c88586d5270c1d58ebc98bcb77de84e46412484f457b52646ee",
    "signature": "0x972c90c42df3a8531c89192bf394ea750ce2a6928a25678f7ec0733a107637be71832e51395c80fe24a405312375d58cdf0be0ec5ab50ab4b7c535d5ba2037b31c",
    "signer": "0xbe916820AF010608151C80f3A74F7c83218094B2",
    "userId": "881446128"
  }
}