{
  "manageEntity": {
    "action": "Save",
    "entityId": "1618279634",
    "entityType": "Track",
    "nonce": "0xfd97b2cd3dfde4ec99e4417d0f4236c6bfd7d6e56e59c5d2ec5c416ed5a0eb69",
    "signature": "0x6aafb9e8d704693e224163b40c5ffceab38dfe930ebbec3e437885c9c38cb2156c54c6c7aa5894648da9e39d86dbb6492aa3dca322f8569f84353087a0ce96e21c",
    "signer": "0x43dA66b40816c8fb9e2B0AA77E0643192169AF14",
    "userId": "636236864"
  }
}