{
  "manageEntity": {
    "action": "Save",
    "entityId": "1207246774",
    "entityType": "Track",
    "nonce": "0xf24fd3f38ae3d6f646a3e8e7cd9841cf6c250c1e96e4e8a78b0718aa448d6dd3",
    "signature": "0x6f47eb89b7a39a4ef813c9305fef3a7142ea9b052dd454b45eb708ef7361a54f532685b2992c3c4e779626fa703c0540a16a5b8b2e658d71b54e800f564b68bd1b",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}