{
  "manageEntity": {
    "action": "Save",
    "entityId": "784431",
    "entityType": "Track",
    "nonce": "0x31e2a3035b9d02da266636e886228ca4b4d1b91894c180d871e10db20946837a",
    "signature": "0xe54256f96de4289cc51c701895fc9128ea90b3d055ebf0cc501ba1d5983c0ff072de3767e55979fc5cb978ed21395dfd55e764bbd9209c627ccc2b14b02163e11b",
    "signer": "0x45c4f1dcE13eeF476C74C5758696D56137253980",
    "userId": "824478223"
  }
}