{
  "manageEntity": {
    "action": "Save",
    "entityId": "1985672676",
    "entityType": "Track",
    "nonce": "0xb0195102ed9f93f74d6a12d27557fdd818b5324ec984b67360ccf016d6f2ca53",
    "signature": "0xa8d141fc63be289c84efc258919dfd5eb8ea756c312d5aa95d20759101076556778fd29e3c9b8fda9de0a44ab9ced65ba8dccf92040f2db96c59ef03a3d090fc1c",
    "signer": "0x2BD0c2111290EB20B2843e8b1c0f25aA5cd52a6f",
    "userId": "618242981"
  }
}