{
  "manageEntity": {
    "action": "Save",
    "entityId": "359856345",
    "entityType": "Track",
    "nonce": "0x6f7b2a8e5ad9fe70f4cc3c174d2ce7bc4563e7d7c74ab1408b2014636eda59a0",
    "signature": "0x4eafbb8d4ccb53f0d793ff9a5c4cfad23c99424e1f3e854c2c0319c12d627540600e2e7a5b074004815cb008a0a98ffc9907cb04682239d1dc8bff32d090523c1b",
    "signer": "0xa2DaB1ebF6D10325b0948C994b592F7abB2Df44C",
    "userId": "728570067"
  }
}