{
  "manageEntity": {
    "action": "Save",
    "entityId": "1955698777",
    "entityType": "Track",
    "nonce": "0xe6116b7b65742cc14593244a2368333214dc3087bbf83ed88a0f2b2c94a4ed00",
    "signature": "0xb8341373d7290d8615fe7253201f5edaa3619e8217645b498dac7caded9d21d1088098e6b7316c70ef0f8e170f5697f56eeb4a498d3cdefbac0886b7f8da6ad71b",
    "signer": "0x7451Cf52e883bc4483b88591c194dc3942E7F191",
    "userId": "584186978"
  }
}