{
  "manageEntity": {
    "action": "Save",
    "entityId": "303013976",
    "entityType": "Track",
    "nonce": "0x547b0d359391656082dd3698c524c9af23161c7755a6215fdf7d81545ea6ff6c",
    "signature": "0x0f53e4c2b9b893cb73a6bd437daa4464f5eb5f95a02e3605e252a5d130d532455f17e7007241292f894f8cb131d272ec146c6a9c07e3f4e1a1fa4c61346dadf21b",
    "signer": "0xe5223Dc6E411A24e22DcF917955e97a8D7479d0c",
    "userId": "981716494"
  }
}