{
  "manageEntity": {
    "action": "Save",
    "entityId": "2021234345",
    "entityType": "Track",
    "nonce": "0x1b59b83b599db94ce9718ee56f6772d39b50e3672f3ee3207d320fbd38dc2ada",
    "signature": "0xc12b06f66f144ebbda729d14a45680d1a093a69de853e5ae8329312c832ffb872ba059614df4774acd08f44aa13b48af095e554779d9af3d291e07caa99ef4461c",
    "signer": "0x7425EdbFdF528603A88c658f4cf8B1396a8a77F5",
    "userId": "406225571"
  }
}