{
  "manageEntity": {
    "action": "Save",
    "entityId": "1783318283",
    "entityType": "Track",
    "nonce": "0x9ad81f2be3ff69b687faec6859202c6b6135b559c5052aac78bd8d602156fc32",
    "signature": "0x0ea75534977cbc846aa393ec062e01fd31a527009d93466ba89df857daee9f2455aab8d2115d0fe23a0cae4d9b434f82951769d8bc28417b10b06d0269f0489a1b",
    "signer": "0x5abad058d33E1C0C0A69d85BA3181678C1721765",
    "userId": "632918751"
  }
}