{
  "manageEntity": {
    "action": "Save",
    "entityId": "1818435525",
    "entityType": "Track",
    "nonce": "0xba42c1d67e90c9c606746bf4d868a7d18afa49e6f7fbf996a5542288884061b0",
    "signature": "0x3eedd23df75e85d0eac6a679ae773ea6b1c50b41c5bf4d208ec2a620494f8cfe1447f384a25c7da545897dbe9193f19ef4beebaf036e662620e0fcb3550a57f51b",
    "signer": "0xe5223Dc6E411A24e22DcF917955e97a8D7479d0c",
    "userId": "981716494"
  }
}