{
  "manageEntity": {
    "action": "Save",
    "entityId": "217631966",
    "entityType": "Track",
    "nonce": "0xf57b1ddfaeef007494ea9afe0a4d86b030cd39a41a0f8635f23d67a3ee561340",
    "signature": "0xd1f85d0cd2625628d16b0eeadcfc4eafa03d3e98e6fc6c78efe9826f624516091491c33e11b57a114d5bc10fe9e143952823e0490e44f639f50a5527d3ac859d1b",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}