{
  "manageEntity": {
    "action": "Save",
    "entityId": "963209171",
    "entityType": "Track",
    "nonce": "0xa9714dc218bd5b9626b7f20080a263fcb70b784eb5d1f5bc80d7ca41489407f1",
    "signature": "0x141fec2c7103b4b5976b07c4b27dbbfb213673309a3f5b497bd89d9db002f1d14909111c1fbb9c42aa0e51cb3613720fcd701f4a2b4cb9a85bad7237899297661c",
    "signer": "0x84B42609E987DD0953e02498E61987fB833B7C92",
    "userId": "887547386"
  }
}