{
  "manageEntity": {
    "action": "Save",
    "entityId": "1336567383",
    "entityType": "Track",
    "nonce": "0x1a12dee51af489f666bc1a46c9474b45093e20196f6219ddd637785169843a8b",
    "signature": "0x1d7b01b4184008ddb88125cb7225bda2a7cc33bb6737ede22fc7ac1a5b4352b871f26b195a1ec3d886bf755a97240649d860e760013e9afa0271ce56f0cd50ea1b",
    "signer": "0x43dA66b40816c8fb9e2B0AA77E0643192169AF14",
    "userId": "636236864"
  }
}