{
  "manageEntity": {
    "action": "Save",
    "entityId": "1177508860",
    "entityType": "Track",
    "nonce": "0x8a0b68403c63b572caa22709d0018116a8de55c53dc6f646aa575f85a61e162c",
    "signature": "0xbabfc72fd207cdecc214eb63f74afbf88a26209166b54c33e1513b2c0ef2dc8122924e9e55de4ed38be314a6f3c275834b728cc5645728b79efd7806709388bf1b",
    "signer": "0xb6B208a8f79b1D88d245afa5aDB0a40d38cd6DD1",
    "userId": "528688046"
  }
}