{
  "manageEntity": {
    "action": "Save",
    "entityId": "575381226",
    "entityType": "Track",
    "nonce": "0x94832cffae561dc3ea4d160e2dc33aeca03aaa7d18468206034ef16e9cef66be",
    "signature": "0x4e9d8b6b504d82a81e028758a569419d3302822a72e68c8bd1b41d2de84c106f702ae6754ff29b0cbdb94185cb840b5c47b18f912e662c433671fa8d54b20ad11c",
    "signer": "0x43dA66b40816c8fb9e2B0AA77E0643192169AF14",
    "userId": "636236864"
  }
}