{
  "manageEntity": {
    "action": "Save",
    "entityId": "406299",
    "entityType": "Track",
    "nonce": "0xde9ef6f17a6a93ca3cbed9078375796beed59ee7cfa41fb825f7f24dc13926cf",
    "signature": "0x36d7dba71f2346a2cbfc1f71cb0cc8d3ac821a482749a3f63073af66d409cf242725de52fbed6bcd2c53357aed6082a0f7b3352c22d1d1bb01a8dba2af4a2a781b",
    "signer": "0x7b52e6AA15Db4Fc3A84AFF2b12e5B8B128eA8610",
    "userId": "808512351"
  }
}