{
  "manageEntity": {
    "action": "Save",
    "entityId": "1736289662",
    "entityType": "Track",
    "nonce": "0x1f16592383523cc6cca11a0b184750912ed6962280443a054dc4d12158cb349c",
    "signature": "0x15725fc2850d97930ed1d9dd578e32961d409c8d5e9958f2ff15607bd69ecbeb44651618841a5c6160c3279eaff5aa11fa00a42662514fd3570b91561be1388b1c",
    "signer": "0x43dA66b40816c8fb9e2B0AA77E0643192169AF14",
    "userId": "636236864"
  }
}