{
  "manageEntity": {
    "action": "Save",
    "entityId": "683836",
    "entityType": "Track",
    "nonce": "0x24b8e07c8511b19400fea162622a422743c68a28851171a8214d5248160f4d30",
    "signature": "0xbb46022afd9463affd9bc154ba4d9780ad0523257d57a2510cd0449074c9e221004d16b64610332c11e1c4b86df6850f2f2ea4a557db8900447de9c896cc82501c",
    "signer": "0x84B42609E987DD0953e02498E61987fB833B7C92",
    "userId": "887547386"
  }
}