{
  "manageEntity": {
    "action": "Save",
    "entityId": "1275560090",
    "entityType": "Track",
    "nonce": "0xa7449a2ecac7b6b8f64c96a5f8d6a3a4de38a58a8749158be33ed584368356be",
    "signature": "0x7dbc3765ebb48f5ce20977b7758dd5bbc08879348a73710e6f48399555ab269c46c6182c3fd6d08674d4af603d44608566ed210dffa52a9c44818910225075f91b",
    "signer": "0xAaC77705f5f6bd787D8581c36Ddaf7c0c7AE3370",
    "userId": "827420993"
  }
}