{
  "manageEntity": {
    "action": "Save",
    "entityId": "188978089",
    "entityType": "Track",
    "nonce": "0xe97bf316bf17fdeb121fadc9dfe08ef69da70c81640894e4208db27c7f3edf18",
    "signature": "0x3055a5426d92fabb3c0e52512c0dd46b47e8985a600b48de4111db80b4acd3615b65f9d8312d9b094747b475c071b9f4fbdf40e43a666231cfc191e7894606851c",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}