{
  "manageEntity": {
    "action": "Save",
    "entityId": "1585783697",
    "entityType": "Track",
    "nonce": "0x8f06773872a5011fc1dd52141c7030104ea1696bb1820f8c396d8e78c8fc5bac",
    "signature": "0xe5f8c196fc942fc7e434f9ffd00fffa890d86e2728b0c4e344990c46d0655caf0929f6e56761df753036f2e3449cb94eaa2953adac327db9f37674cb0e98da2c1c",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}