{
  "manageEntity": {
    "action": "Save",
    "entityId": "273609",
    "entityType": "Track",
    "nonce": "0xc1092d43ff6716fa0e7ac2c7a7e54e0f4dcaacf874de9c34eb074177da87b4c5",
    "signature": "0x849e3b7a31f451c3c4569630e4b8dc9f5b5c9eafe464f1bb1f16574a4663a94f79252744a4cc9a631c277a8a02ced4e04eecd9f8ce131b68e199b30aa40004f41b",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}