{
  "manageEntity": {
    "action": "Save",
    "entityId": "178703",
    "entityType": "Track",
    "nonce": "0x9ac2e8dc61fad49e0e71b2179a328475b2bb3ccbff1bb734bf9d89c65e15cf78",
    "signature": "0x0038df7a4428ab89be8a620069e5b9c68651260041b9a80abf7828d4125680407f88822e806961abd322d0c90cb8ba741e82bb103c73d0be67ebb37c1442b7de1c",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}