{
  "manageEntity": {
    "action": "Save",
    "entityId": "952476",
    "entityType": "Track",
    "nonce": "0xce8fee6005f505d840fbde90f56ac11e61a471ca111ddb05b618928fbae9fd41",
    "signature": "0x8cd50285236b13f69d9eecc5adff43eea4cefc197caf0e14797b83367b5e6fe0112ba202148f2056eb497db1175c0d01c024b84536ad786aed259047b1b691071c",
    "signer": "0x054e09f99C97c131776f34585E9a5e30a7889717",
    "userId": "248129506"
  }
}