{
  "manageEntity": {
    "action": "Save",
    "entityId": "1316965408",
    "entityType": "Track",
    "nonce": "0x40e00a99fb399e0a92ca57085b2621110355b326c6ee621e3f62c3bfbb3d5caa",
    "signature": "0xed0fd3ca3170d6e8e68258f8c8c3757855cf566424358de024609aa7fce922fa0e9b1641f751826cd3ab0d13d3c653833c83ea99ec1ee64a4e1b43f5e84dd09a1b",
    "signer": "0x204E506f1D5498d2CABD41d2fc7a3078d5792835",
    "userId": "768479471"
  }
}