{
  "manageEntity": {
    "action": "Save",
    "entityId": "904882366",
    "entityType": "Track",
    "nonce": "0xeab2068ad22a686bcb3de08de97791e52928ec6fbfe205c4f83c8d40f5507fb0",
    "signature": "0x518fac706ff7b71037820ebd0845b778e81887c2be607bc14544a03dae9d642e35695a4e5652dcab6bb05f5d674e442d589badf8418906a902bc7fc534b1ba6a1b",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}