{
  "manageEntity": {
    "action": "Save",
    "entityId": "1279400238",
    "entityType": "Track",
    "nonce": "0x2c0b452a7f502d1b60ed2f434c110e4584f839a4939997b10bdc2e22030f145a",
    "signature": "0x8f0d0b0f4fd71914ef5b4a40155d10e421118265cb5180a92d8eb2b75fcb82b255c822bbb8f749fa49514f840b959cff02eb40069f001d1820ee3329ff47cec31c",
    "signer": "0x7E7b9c4DAC3F284d889a5bc274eA80b8BA5F63ee",
    "userId": "670307808"
  }
}