{
  "manageEntity": {
    "action": "Save",
    "entityId": "344435586",
    "entityType": "Track",
    "nonce": "0xccbf3d12d4244d694f34358d1e8e633a586f85c590e097605442d783c25c6426",
    "signature": "0xfabdc5a6ca990728323b3085b6bf4abb72b4b978704102bc608a83f9a7912dd61e19af2c527249727a1d5c6e48a9be7096de37df02439cff3a4190f6495da4ef1c",
    "signer": "0xfeBBAF2B7d9F5bE3DAA34bEe70259f61ac4aB836",
    "userId": "139146722"
  }
}