{
  "manageEntity": {
    "action": "Save",
    "entityId": "193284",
    "entityType": "Track",
    "nonce": "0x6299051ea863c936cb253c0517345fa7472fa38b2b39e722dde3dbd6948f91e4",
    "signature": "0xf1edd98e2641a585a43106977ba280666409908f6298e9dd9a10cc072178f51b5b56f1ed846ac91758ef260145fed251559ca481c4f708ae5e52a22fc332fd571c",
    "signer": "0x262a2A1c96da0dFD6f33595c8D775BefA860d02e",
    "userId": "486490947"
  }
}