{
  "manageEntity": {
    "action": "Save",
    "entityId": "286100246",
    "entityType": "Track",
    "nonce": "0xa63640ee56d00ede6ea20d483eb02cfc7a0f4c441140f1e7d8bec27a6f63ae6a",
    "signature": "0xef0139ae8b9119a1aa6f73f04833c6165bb72a761959d7a0ddef16c85616b0d36a1badfe5054f4400144970733419d23a47fb076c482df751a94bd5aab0424d81b",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}