{
  "manageEntity": {
    "action": "Save",
    "entityId": "658929242",
    "entityType": "Track",
    "nonce": "0x6d566f1829eeb2158ee7b499a6043509d63b7a5a3a9572897f688503f03b1f34",
    "signature": "0xe57fad1a064ce10006e902921d69fc66785e907fde1f274d4904c526d06c022f630d9595e5c2453abb7c8bc019116c116af25e1f15e5e4ff769f673f59b5e68b1c",
    "signer": "0xf765901fa8CEf102E6aB615eB224ff151Daeef98",
    "userId": "582942186"
  }
}