{
  "manageEntity": {
    "action": "Save",
    "entityId": "219192594",
    "entityType": "Track",
    "nonce": "0x7a6e03272b12af0bf9a3487bcf6835bf7cdd994645fc6cb1385758ea7104c9ae",
    "signature": "0xcd3251a84bde60a943bb12caa11a4a8df438f2e1b3566ea7358d143e4e6f03a12918b536c9b46fdb390310bddcef4c2d581cbcbb32fb3eeee5986569c776d23b1b",
    "signer": "0x5452f86EfcB1153FF9C10bdbe4103Ce25434D124",
    "userId": "620307004"
  }
}