{
  "manageEntity": {
    "action": "Save",
    "entityId": "485946",
    "entityType": "Track",
    "nonce": "0x5fb906f1a527614f3dc055cb541013fd2fb0802231d7e62297513533ce4a1adc",
    "signature": "0x6f4ff838e43246d2a4f86b8ba890f837224d0defe436712445643b85308512b139ea5032cabb9cdcbd30db88e380f8dcce6d1e0a9b74ce4deca73812b4005a461b",
    "signer": "0x44BAdCFCf42113CbB67f519e4efa576B336f9bf7",
    "userId": "136844578"
  }
}