{
  "manageEntity": {
    "action": "Save",
    "entityId": "1851231621",
    "entityType": "Track",
    "nonce": "0xdc8913ffdbf03a106dba4b63efffe91481e60c0df3d043f0390d551208d24a8d",
    "signature": "0x16b754901a8e27251dc771ee41e992d1a08bd500f5d43cfd4599b4fe6104535a2427270a2d506f76d823a68a7abdf36ee1c990dd9f22409a552e788e2d8564721c",
    "signer": "0x9765cbE8e26a2c6c4847C1B69ABeB0B5250EC254",
    "userId": "678556080"
  }
}