{
  "manageEntity": {
    "action": "Save",
    "entityId": "2125981951",
    "entityType": "Track",
    "nonce": "0x0e5c33b5168e66ea6781df3f31c1fbe646f867da540d227e912eb0481faa077f",
    "signature": "0xf068e546c86c4913315146861a10e3212aeca3836ea64c68e4bdece3d567cd4e0e20a8b7758fa0cb44196e758c2ab236a04f0c46cddedf58e0bbdfa3aebc8aeb1b",
    "signer": "0xbbB98413eB671bb0000F0b18A2A7Cae9631043E1",
    "userId": "98311147"
  }
}