{
  "manageEntity": {
    "action": "Save",
    "entityId": "1990695165",
    "entityType": "Track",
    "nonce": "0x8183b0906e4763f419b1f9ec9a48248a223da52e05b07670cd9beeff267062e0",
    "signature": "0x3b260bef3f6d13037a82d258fb02f9802d555f8f9a9190bf4c2bdeb48f84fbe5182c4caceab69eed6a1aa952cfce4860f0be5f54ef17eba49ce5a787d53016851c",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}