{
  "manageEntity": {
    "action": "Save",
    "entityId": "967704976",
    "entityType": "Track",
    "nonce": "0xda2fdc9c526e52501776d0e07b5d112972c3d0079d5448c36fa16e3e67382d01",
    "signature": "0xd4a0657bd7dd553e63b34cda10b9b518fae661ccaf42ee47a3b5f01a3a629b1d6144c03d651ce08581ee68d68f748b4158f315f8ff284c8424b9856670f8409b1c",
    "signer": "0x44Fe9338D9d1405927C73FDA0be0F36ae481Cd39",
    "userId": "983568397"
  }
}