{
  "manageEntity": {
    "action": "Save",
    "entityId": "994703",
    "entityType": "Track",
    "nonce": "0x0f37803179b5a78d897356c94d088063e8e66425c3446ab0b0784ba0a0d7da39",
    "signature": "0x4e7249f9d9019dbb73ae05bf91db840ab1936aa32a2bf0ad5da8bf8d8b7554b2520a3e6dcf5d12cb94370dca17786ff739a820c7672d05212e8cd862108602f41c",
    "signer": "0xe5223Dc6E411A24e22DcF917955e97a8D7479d0c",
    "userId": "981716494"
  }
}