{
  "manageEntity": {
    "action": "Save",
    "entityId": "324322427",
    "entityType": "Track",
    "nonce": "0xe34d893e1bc8827545132993a6bb5101f867d148048232199d4f128f6d2e74b6",
    "signature": "0xf7920f2dfe27222de69629655ee400682eaff8be1c843da49908d42956e5bd2526935cd2e4a593ac68fbda01d5530f81f90b2cf474c0fba8646733cb879b6acd1b",
    "signer": "0x90CBf7c9BBF688fd9Fa4029B96e1BC32b270cA24",
    "userId": "711459379"
  }
}