{
  "manageEntity": {
    "action": "Save",
    "entityId": "964627",
    "entityType": "Track",
    "nonce": "0x11796ac062334dc612b5dbc571c0e086d23b64c85ebc63986b9d702abe363717",
    "signature": "0x29ede4106681d7dd281022ce4d839720fa8c682e5b2e54273fe1a08497b173c42fb94b4efd76580919ba7b7a9baf95622f482794522780139b236e90f8499a3e1c",
    "signer": "0x2BD0c2111290EB20B2843e8b1c0f25aA5cd52a6f",
    "userId": "618242981"
  }
}