{
  "manageEntity": {
    "action": "Save",
    "entityId": "132678271",
    "entityType": "Track",
    "nonce": "0x4552276351eee967d640c6a4e6a81a74c201c36cf5f291b78315a1cc81952ca3",
    "signature": "0xf3976550d078d9dc8f331384200c6b730f9dbbccad22837ee31534750f1bfcd0365dac37526622c71b38d7cde3755d978fb409da56bcc15920de8bbefc0eaf6d1b",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}