{
  "manageEntity": {
    "action": "Save",
    "entityId": "1289552167",
    "entityType": "Track",
    "nonce": "0xa5e167bcf7a44856e436d4d6a3ab116e82b8a690330f2dbc66161d4bc0bb896a",
    "signature": "0x705a0f44759182efa20a1e4d50d027fa848244b44837af4ae6b5e8b464f8747201be3e7a17cccee2f7a77055839ad6b982668bd6754a556df65f6cf79ccdaae51b",
    "signer": "0x2F7db4C1AE3922aD0f32CEdED1870278dd17b64b",
    "userId": "467213409"
  }
}