{
  "manageEntity": {
    "action": "Save",
    "entityId": "1393879954",
    "entityType": "Track",
    "nonce": "0x15de49619c0122e7fa23be1d77d7e0ee74dbbbb2c769f2e30f5b2f002133443c",
    "signature": "0x5ae0a417899b65ca7fdaf594df5808d5947a91dd084e46f5803a90fbf7aeecb6374162f41db1089187c5b903304edb11d1c2f83f54a0fa8e37a3bd7294358e7a1c",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}