{
  "manageEntity": {
    "action": "Save",
    "entityId": "225365348",
    "entityType": "Track",
    "nonce": "0xe55999f953bf637f31b56d0a9e829ccb4b206f6b1726608c31258b3b6bc07a66",
    "signature": "0x61d945927f4751eb904717f6035eca1d805bfd11bd550c05177f146d192c79775d6a151b142660ec027a5a6fb8ea326dc84671c32be18bd1832c194e6a5cac9e1c",
    "signer": "0x481d41B4b34069e19EDC206C160447ebA0841f6F",
    "userId": "854614078"
  }
}