{
  "manageEntity": {
    "action": "Save",
    "entityId": "1154960838",
    "entityType": "Track",
    "nonce": "0x751f3e2389d03ed0495c80d2d37e391305c4a05493e37be62ec1d4746aa9a7c5",
    "signature": "0x9195f5913c96f182ff4e7b53f08a5f670311ba60deb07dfcb486ce625cd611267c32233f340fbea288f193a5e52f7fd58dd5d3b78bbccc3bb474627cfe6542fa1c",
    "signer": "0x37C656432bDD87630C13F60036e9857B5ee36154",
    "userId": "288167767"
  }
}