{
  "manageEntity": {
    "action": "Save",
    "entityId": "847943671",
    "entityType": "Track",
    "nonce": "0x705d7e2df4f851922993efab6aa634380dd0be7055842a1047d1c7772d9869a4",
    "signature": "0x09e08d89c3a650bfc48679f7d8f7af4bf43ac7705e2f387793cedeac77bf9b405b5c94903e67b56a256159b0645d192eda26808b8588fb5a00215f8b7b7e8c491b",
    "signer": "0xdA0eFB0e7b973C487c12501759aDb23012CB5248",
    "userId": "178070"
  }
}