{
  "manageEntity": {
    "action": "Save",
    "entityId": "1286776809",
    "entityType": "Track",
    "nonce": "0x15b7ada89a36162cbaebc1105deb3b42471d2db277a746752f672ce883cf2c52",
    "signature": "0x184b85e8de5845e078f8eea3d30a94f27a52a4b48b639e9683b1130fb34e136d19ca8b8c516ba10bcd8a143b450f01ec6b7e0b4e245b6845a320e8075c00420a1c",
    "signer": "0xe5223Dc6E411A24e22DcF917955e97a8D7479d0c",
    "userId": "981716494"
  }
}