{
  "manageEntity": {
    "action": "Save",
    "entityId": "539470629",
    "entityType": "Track",
    "nonce": "0x94ca01d6ee2f0255bb3d0e9ae4a1aa12df1733406d8288895c2bad34365b1ff6",
    "signature": "0xfafbee1c0dd757dffa94c33bbe8bc79867d82adce764e1b814158407ce048a5a08864c99cea413f8fec8f3aa7ec334d44258253089cc0ecce62a075fb3e127e81c",
    "signer": "0x43dA66b40816c8fb9e2B0AA77E0643192169AF14",
    "userId": "636236864"
  }
}