{
  "manageEntity": {
    "action": "Save",
    "entityId": "1810863870",
    "entityType": "Track",
    "nonce": "0xb474652877a7078dce52ecd0065cabb90ab01181ac32f54fb2e2eb7406c06dca",
    "signature": "0xc85ad97516544d7da12ff45417326f9910e8fda67af8d913862aa48785c66f980cfac0f0debfdc845563ec96b501605232818c6d6c8729c77cbd5f2cd0ed998f1b",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}