{
  "manageEntity": {
    "action": "Save",
    "entityId": "74414855",
    "entityType": "Track",
    "nonce": "0x5dc6afcfa1cfb705e1a2ab4a8d26c4d90a9a8b1a11b6a63cc7e4bd5067e99cee",
    "signature": "0xe357b6aace3e725fd9841c29f010e853b1bee6748394c342a4e845e52b9f4c3f70db659c069f5a04c8845d82e24257f8fb94bf8572e8f2327676b4bc82aa308a1c",
    "signer": "0xa2DaB1ebF6D10325b0948C994b592F7abB2Df44C",
    "userId": "728570067"
  }
}