{
  "manageEntity": {
    "action": "Save",
    "entityId": "1677686989",
    "entityType": "Track",
    "nonce": "0x1f1f1fe9403cb2cc5ccf98e65bcf35f0f7feb1d765e7b8ec8b3dde633d245e36",
    "signature": "0x0a3e74b95506a479c566fe94c6b90b338a92c1a488e106d1b36d5cf7a0ff192b248c47f46f743ac91eb000596786d609c16c1a714f2d0e137b77ac2a9961820f1c",
    "signer": "0x9765cbE8e26a2c6c4847C1B69ABeB0B5250EC254",
    "userId": "678556080"
  }
}