{
  "manageEntity": {
    "action": "Save",
    "entityId": "2120597642",
    "entityType": "Track",
    "nonce": "0x78a0a9ac3a5961a0d9bc794770b3be6c152a6cee393623d5017fefe9121a87d1",
    "signature": "0x28cafa88e73d51b67c873597df1511fb483e1e37c70faacfb1a75b4bc2c96dad363467c5db95f09c532bd2ac061d490c3f8fb4341b7e74ac6da42b999ac373b11c",
    "signer": "0xa2DaB1ebF6D10325b0948C994b592F7abB2Df44C",
    "userId": "728570067"
  }
}