{
  "manageEntity": {
    "action": "Save",
    "entityId": "564869",
    "entityType": "Track",
    "nonce": "0x377c652d765072f314711e2ca6ebd6f94095885848fdab2a02d169bfe569158a",
    "signature": "0x6402ef22c2432be24254501bcb7d66486a32ff2953f42de6549827c423641e863ba07dba3c48fbc0dd0f29525cec00488a00624b3e3c9959d2d97a6f7ee3dfdb1b",
    "signer": "0x4596Af3c2C6431486ddFC282464aFfA4d54a3845",
    "userId": "10241"
  }
}