{
  "manageEntity": {
    "action": "Save",
    "entityId": "1894877983",
    "entityType": "Track",
    "nonce": "0x880a0c551b5a0de16847538297d762bc3e62dd49a747d963914ed7bdb74a4f44",
    "signature": "0x977f838e6e944678f2cc13fcca6f1c05035f70a6b13d4b520037f60e8cf90d537175af53499e365429d6861cb4968ecdccd929651ef0f37a13f01850c5a93eca1c",
    "signer": "0x262a2A1c96da0dFD6f33595c8D775BefA860d02e",
    "userId": "486490947"
  }
}