{
  "manageEntity": {
    "action": "Save",
    "entityId": "817956282",
    "entityType": "Track",
    "nonce": "0xe818afd9b0a9fd83a379ba76e5f094c32c28cd78b44c73480167409099e9eaca",
    "signature": "0x3249e73598628a4694864c0ae4cfabbbc21c7a213c265f7376c1487c301c901826f51cbc88e45f361ccebcf4213a201e3577e65d45bd8fdb9312f43d5dd6af831c",
    "signer": "0x481d41B4b34069e19EDC206C160447ebA0841f6F",
    "userId": "854614078"
  }
}