{
  "manageEntity": {
    "action": "Save",
    "entityId": "319572",
    "entityType": "Track",
    "nonce": "0x411df8293bd49ce34c2a2b4350ca376875017da06d66e5ae4d80c1143879d2c9",
    "signature": "0x288ec2d505873c3f525a61731a5f812ea45599dc82363199a2ecbf795c6e80da097ecb691e59efa40d3d9f1acfe06596aeef302795e09f31c90474d8f282ef5a1b",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}