{
  "manageEntity": {
    "action": "Save",
    "entityId": "562479939",
    "entityType": "Track",
    "nonce": "0x6674970c59f554394c339371ec9d456030ae9f347cc3d41480c41618a7362b82",
    "signature": "0xcdc1ff8d925857f704e6972480cec77d1a276859ce515e7028c0d98595922f9a2f0d9a5f1dbb3a54f68b479c47286242be069ed3d94feabce50982f2b4cc038c1c",
    "signer": "0x95bc9101F0E3125Dab3b9e39ACc2b72eE7C8a02c",
    "userId": "380062588"
  }
}