{
  "manageEntity": {
    "action": "Save",
    "entityId": "2075277792",
    "entityType": "Track",
    "nonce": "0x89eed3ea45c1ae0f0890838ae9f3f21b66cbeda0840c5fe363358cccb9d653a0",
    "signature": "0x93481a47a82517a460fac1862460e66a66f36f60e324a4b7c2ff7a3614fcfa0867babb36096e77962d13b4c3690f6a17a0527e45432a38f4d24ea2a452afb9cf1b",
    "signer": "0x8593e16347A4E22E2ca49EA7DD9C24C257c66AC0",
    "userId": "213423670"
  }
}