{
  "manageEntity": {
    "action": "Save",
    "entityId": "179643445",
    "entityType": "Track",
    "nonce": "0x4ef6c54f0e5d25c67d385da1fe149309a11d6a1c3bb123f0d7404c141576b477",
    "signature": "0x29a153484e3b2a104198cc27dcbbeab82b721d18c78c7e4de2f55b6472ec844012e2457a07a0580ee7ceb1f4001a78db7a4b2bdcdeff2d5b6ebb669dce44c5191c",
    "signer": "0x43dA66b40816c8fb9e2B0AA77E0643192169AF14",
    "userId": "636236864"
  }
}