{
  "manageEntity": {
    "action": "Save",
    "entityId": "1629822809",
    "entityType": "Track",
    "nonce": "0xd3846365c07217402b62753633fb4c6f74b21653d6eac0b9350b30d10f454464",
    "signature": "0xe52036b4e7a1403837e6edde03e346812ba5ece7d0da2dc8c42279425d75f98f2a0b6f0673205094409b45a8b21bb3d1a085a4aef7d7f4523f4c885ac94a86a91b",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}