{
  "manageEntity": {
    "action": "Save",
    "entityId": "75694",
    "entityType": "Track",
    "nonce": "0x4efc8966eb2c05d2c0a13550105d211e2360c692ac414ea307e1f9a2cdda4149",
    "signature": "0x180d04470ac342bc33fa2163571617d006d5cf9dc4d93b2d4add91f041a8acba2395d085ee15bc127505456dda90fe477aae0b2f518fc2094341b91544c340971c",
    "signer": "0x0fe82f565AaE260D57b8e691c61Fb05fE83B6F81",
    "userId": "614212580"
  }
}