{
  "manageEntity": {
    "action": "Save",
    "entityId": "135131572",
    "entityType": "Track",
    "nonce": "0x254718b66b71446f68578fc635dc51e828f26555f675a826b065ed8f24b4b10e",
    "signature": "0xa797dff4b40a599881de78c58d6c23920dadeb45c9f7f7b1186a053b698882fe364fd5454e096cc9f57c9c10fcdc5a2bb90c62815d6c03e0132ea7e7edb5a3ea1c",
    "signer": "0x43dA66b40816c8fb9e2B0AA77E0643192169AF14",
    "userId": "636236864"
  }
}