{
  "manageEntity": {
    "action": "Save",
    "entityId": "1424346533",
    "entityType": "Track",
    "nonce": "0x1119d073e3326101e4a1edbd0776bb312f7b0dfb642e8e6a7b2e2b1169082c4b",
    "signature": "0x4dd8d77eb68958a20ffa4cec770c04ccb51b061e3f4950b32fb3e0beb3e39e261b4fb9529878f68db397769a9306e7fc87350537b939314ec840b44122f6b6211b",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}