{
  "manageEntity": {
    "action": "Save",
    "entityId": "564853",
    "entityType": "Track",
    "nonce": "0x37dad685a376a01a93f64b5c6a9070eaea727a877c061ab18cb602bc4fefeb46",
    "signature": "0xd6d828ba042f279d9ba33154a171c80e8eead0c07c591b0982bd00a9728aa28055c87d5d10ad4b1794df2876a0fc4938eb2268678f0257721278665f545751cb1c",
    "signer": "0x4596Af3c2C6431486ddFC282464aFfA4d54a3845",
    "userId": "10241"
  }
}