{
  "manageEntity": {
    "action": "Save",
    "entityId": "262801644",
    "entityType": "Track",
    "nonce": "0xde733dcef7645aa5b378026aa1ae18493c69b76eab8eeb14cb5e1eed6e0bf68b",
    "signature": "0x01bd6cc384c844fc21af8e1d97a92658ccfe41c533393cf97ef7423cbef0cf0635c63de7c7fb4d94be1d072c3300fc616cf1a1e36b0b5ca97f4ee5d27120096e1b",
    "signer": "0x4fdc03E53311BF6b1B8728dd0Ae0630bF74176f1",
    "userId": "162770660"
  }
}