{
  "manageEntity": {
    "action": "Save",
    "entityId": "803340076",
    "entityType": "Track",
    "nonce": "0x18bf69c875c48da4b50a51bf367f9c47ee822f15d7429066f7cfe1a035471365",
    "signature": "0x36afe0232e2f2fdb4fb59ca5197be790a8a498ca7e2cadde166ee228e3fe50746d5ef3701f6b7a1db1bf3955572603e403558f1c0e8af5f9656ae6ea57fa62791b",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}