{
  "manageEntity": {
    "action": "Save",
    "entityId": "1745649587",
    "entityType": "Track",
    "nonce": "0x1eda7594f51622319bafdf29cdafc83db51e6e3b51a257c92bbf402517ddd495",
    "signature": "0xc48ff4496e99269524ff2e0f7b2c897f3b104d9bd1a4ad58a510a79df58435df4e3aafa36d324d15bb1f22190d8e94ab8b633e65b458ef677c390afcc82111a71c",
    "signer": "0x0b901AE3Eb7b439095858D82Ff194CfeD0Fd3396",
    "userId": "167557"
  }
}