{
  "manageEntity": {
    "action": "Save",
    "entityId": "1920641477",
    "entityType": "Track",
    "nonce": "0x1d9bdbc467effe721daaf8ee1d594f59f6b39718f5c8bf07d569423470218cd3",
    "signature": "0xfbe784a72e601dc91bfee3b4279eb9cb5c2d6cb8ecd5d11c3e6cf7debd252f5664ff0bd284dcc1ed4e905fc0e9b3de6fd5170bbc111e7884d837f51b141284be1b",
    "signer": "0x6f2E856bAE9D99f862016d2a2A444B395a759F47",
    "userId": "206867145"
  }
}