{
  "manageEntity": {
    "action": "Save",
    "entityId": "466189383",
    "entityType": "Track",
    "nonce": "0xa34639c82afd2240276db5b5a1088b7906f0ff5092b8093f263e33aeba26737a",
    "signature": "0xca6ff836614aabcc054d525318e86b3b40ae6a924d440263f2f83106e7f1cd4822ae450c83c2eff0260773182bb9b83415469060883419dd9b603cd40c5d6a6e1c",
    "signer": "0xa2DaB1ebF6D10325b0948C994b592F7abB2Df44C",
    "userId": "728570067"
  }
}