{
  "manageEntity": {
    "action": "Save",
    "entityId": "1127638662",
    "entityType": "Track",
    "nonce": "0xa55b89f83c01be310fe4caeb214d143682b8724e7a6ed9a0e711e6e123e26994",
    "signature": "0x626b38780881ea36eea1e686a773df24c9d85114a05ec5c44eda36f0166034b72e7da47706c3d80c9505fe1dd8bbd3aad5709d1f01c0abc318278a92ed4090311b",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}