{
  "manageEntity": {
    "action": "Save",
    "entityId": "1233471890",
    "entityType": "Track",
    "nonce": "0x0fb9e14c2b85ad7c495889ade26f8779848dc7be86445e56ba365cc4b1ce0098",
    "signature": "0x6b935c5869fcc7f5d6c42e7c2358763dfedca9156ac537cd11e5d0065c342d6565fe738c3000311b1e430cc07fef5336011ef4ba87eb46093e11e6c348696f311c",
    "signer": "0x06F989586c5477333A41f6057f224Df79903862a",
    "userId": "24240642"
  }
}