{
  "manageEntity": {
    "action": "Save",
    "entityId": "694807868",
    "entityType": "Track",
    "nonce": "0x8612cc30f3098bd7ad6e68323724cc5a008f06f829678e0f6ff103d317dbf4ad",
    "signature": "0xc235880c392c67f0454590b92e6647ab210420ac0ab75bd2c9897818ed0e321e4e7b07315bb6b983195f2a5b067215e07360374b965bc54433740b83f443694c1c",
    "signer": "0x7E7b9c4DAC3F284d889a5bc274eA80b8BA5F63ee",
    "userId": "670307808"
  }
}