{
  "manageEntity": {
    "action": "Save",
    "entityId": "1210033479",
    "entityType": "Track",
    "nonce": "0xdef122281ea2c5e77d8e99d8dc3413ec5438f1ff8f53a33ded5dd385e4ecd75e",
    "signature": "0xd417107e920deba0fb4dce07c0158e862c28dca785849fd9f0f561c7b7cd47973599644b42a7fd137e0dcea3f7aa23828dfbe466cf6dafe343cb3e6791c748e71b",
    "signer": "0x849938DF063059EbF6d907f55E72C083347C9343",
    "userId": "796529120"
  }
}