{
  "manageEntity": {
    "action": "Save",
    "entityId": "1270200132",
    "entityType": "Track",
    "nonce": "0x979b1e05af68719f2f903370dd27b7d0bebaa96cc71b09a1d31e554dc8a81678",
    "signature": "0x6e02fef0332080e156a7b90e9a5f86e729bcebf2aaf032618ae83c10ea04c5f04e5126e9ff5b13ce18c5531132f0df4fe9ab53ec06d7199335f70a78e6cba1d91c",
    "signer": "0xa2DaB1ebF6D10325b0948C994b592F7abB2Df44C",
    "userId": "728570067"
  }
}