{
  "manageEntity": {
    "action": "Save",
    "entityId": "1624636523",
    "entityType": "Track",
    "nonce": "0x9e70b5a933bc9d5fa5d0730d3d3a5dd3236f4569fc8f4daab248be85debaae24",
    "signature": "0xf99015b3cfacbdd8f5ecffe54a9c12fdc4fdd33908a7da6759d350a82a221373003d640d9bb8fdee0d4cbbc8b9e33a23f52c47d76313aeb1bda32928d0ff1ef01b",
    "signer": "0x43dA66b40816c8fb9e2B0AA77E0643192169AF14",
    "userId": "636236864"
  }
}