{
  "manageEntity": {
    "action": "Save",
    "entityId": "1092551",
    "entityType": "Track",
    "nonce": "0x391576ed6c2e1b1a676b267d4f41e75668716d885d386b194b572dd4c5c0aede",
    "signature": "0x3792398d10208f79a87ea24a236891150fd4b8c1492697215106910ac308ff9022cafba159ac873dc60f06df1453dbe53814419f718d14ce71558768a31849921b",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}