{
  "manageEntity": {
    "action": "Save",
    "entityId": "956155",
    "entityType": "Track",
    "nonce": "0x89166cdff86a69da35accc64aca906dbc1c32dbd93f861753b78b477f36aa642",
    "signature": "0x3b121c96557860db7f6ca440f24d4386984578af3434025acaff4b0f6f4d41ce0b78072fe173568df17f2056c305ec1e7c5793436180be80ac6226747981f4a41c",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}