{
  "manageEntity": {
    "action": "Save",
    "entityId": "1251788838",
    "entityType": "Track",
    "nonce": "0x2c3395a69af1d6393316e1c74acd06dc1583dea3cb775254b2ab4e4f0c8096cb",
    "signature": "0xe49eae786e2868d9559efec007605fe31416ab1c83f6c8619a876d574ca7a69270417ff874479b28bdd7993153f81d94ced5220fc7f964d52a0185a3f57dae5d1c",
    "signer": "0x5452f86EfcB1153FF9C10bdbe4103Ce25434D124",
    "userId": "620307004"
  }
}