{
  "manageEntity": {
    "action": "Save",
    "entityId": "1513945368",
    "entityType": "Track",
    "nonce": "0x5cdea22afd7051ada9601cc24d6ff37d5ca515d99f90dd6550e8dbab52ed06f1",
    "signature": "0x81eb888c0f7e6059bd25835e002b0bcafaf0e483eb6c5674e4846eadc2e04fd24396b7ebd37354618f5b33e0959b15bff552107e61dc16c1b2567ee602e564841c",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}