{
  "manageEntity": {
    "action": "Save",
    "entityId": "1155862710",
    "entityType": "Track",
    "nonce": "0xbc0602fe4ee4d9b4a62a6a99a66cf1d96aaf5454bc079c7946cc7e5d9e09f815",
    "signature": "0x7da623a98e8a51a17c25918523e2cdbb78ee3a12822d02d1c56a5754053141b82d2bff13c23ac7cf83ec3fb6995e47e80e6bc93df84be6ac5cdfc7970a0ad3bf1c",
    "signer": "0xE7D37531a757aEaf8B2c8037a79C03819edc20Dc",
    "userId": "870684573"
  }
}