{
  "manageEntity": {
    "action": "Save",
    "entityId": "1293531126",
    "entityType": "Track",
    "nonce": "0x8c9957779bf0558bf310bf16c819a2086262b2ec69fe574bb574769c43fcd929",
    "signature": "0xcfbd3008c1b58ad9d53f3dd11ae687b46de9c7312b0316c622390ea0ded738187912f99cc8219c89abdccf4882a95939ac08c449ccf2a657d70d05d94c3094cd1c",
    "signer": "0x44BAdCFCf42113CbB67f519e4efa576B336f9bf7",
    "userId": "136844578"
  }
}