{
  "manageEntity": {
    "action": "Save",
    "entityId": "42551391",
    "entityType": "Track",
    "nonce": "0xecf2cbe5b5ffd19192b8564e74a1992d07933fe6272eabe7b0fe6cb8f59144a4",
    "signature": "0x5dd057f6b413533f67a9e99ea7422d18b8b8716d1f5855da8ed7b02fdb23a370118634251e5f4298cd00dcb4bf720e8db8d2175df9383895918c07368d9c28b11c",
    "signer": "0x262a2A1c96da0dFD6f33595c8D775BefA860d02e",
    "userId": "486490947"
  }
}