{
  "manageEntity": {
    "action": "Save",
    "entityId": "285952",
    "entityType": "Track",
    "nonce": "0x05e36611aa28297d79db5fc637bdd3ec478e96afbd38b002c36c5d5cfca99ab4",
    "signature": "0x06ba77566cf6ff6eb3a52693f6d4738b33f14e3f91b40d72af445c6a277288e42dff92ed4c3942008ef5b28bcc0af2b7556c7d3b12b1ae1e04857d9695467f931b",
    "signer": "0x43dA66b40816c8fb9e2B0AA77E0643192169AF14",
    "userId": "636236864"
  }
}