{
  "manageEntity": {
    "action": "Save",
    "entityId": "465318316",
    "entityType": "Track",
    "nonce": "0xbc8b252cd364314224ee8877dcc777b08e187e19f6ba4d902ce48af381146248",
    "signature": "0xa40ac9d9f2cb5aeeb009be0f1bf8a0f70a888bcc05f840e6cfea1779293d408e4b8e892433a7803e4353f6afbf79f946bd707b84270a9947c6f748093d456d401b",
    "signer": "0x7eBAab495a64FAea1f04dc59ff804bf939da7B12",
    "userId": "709077025"
  }
}