{
  "manageEntity": {
    "action": "Save",
    "entityId": "1951142795",
    "entityType": "Track",
    "nonce": "0x4f37b83de9c6307693a848e332749b1173ee812f0d8897b804ece11b163d090f",
    "signature": "0x4ee891ba25213f8e6d867640260ef08ff78f06153f632db6e6ccd08fb7d3c7491d0582ded086e983b3a382cc57319e9423f418e7a8877a58c788a746cd1264c51b",
    "signer": "0x7425EdbFdF528603A88c658f4cf8B1396a8a77F5",
    "userId": "406225571"
  }
}