{
  "manageEntity": {
    "action": "Save",
    "entityId": "1772648412",
    "entityType": "Track",
    "nonce": "0xf41122d924f8f5020dd3a6ac0cadd99bc938e6f8810dadd4f67a178e4c9d5090",
    "signature": "0x11b9c036378d6443bf8fd5e4508f1d87227526246ba22bd4b22e0bdd48dcdea26fb9e57f60f8e51cac83203b98e52eb0da3c0f24da82f92d01d4880b517a27921b",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}