{
  "manageEntity": {
    "action": "Save",
    "entityId": "857227142",
    "entityType": "Track",
    "nonce": "0x79485307da20bcf333210dda138ae5bd3aa033a5f9f61a9d05781be108cfa801",
    "signature": "0x2b796dfd4c6842c6064379515e2405f99068ec787fa60a3502dd8e65969f361c1eaee09ec705a6f442b0bf8a5789f252856e77dbf4f90c88ece5d654dbe010af1b",
    "signer": "0x94e0dDC50579175818AaCFBC9aba8B065fEf2a55",
    "userId": "460147282"
  }
}